Comment 10 for bug 1240376

http://bazaar.launchpad.net/~kubuntu-packagers/kubuntu-packaging/kde-workspace/revision/721

before exec

        # Since we have no plymouth integration to take over the VT we simply
        # quit plymouth all the time. Note that sleeping appears necessary
        # as the VT freeing is somewhat delayed and KDM would otherwise go
        # to configured KVT+1 (if plymouth was using it).
        $(plymouth --quit && plymouth --wait && sleep 1) || :

so unless plymouth --quit doesn't actually quit on 12.04 I don't see how plymouth could be running at all using kubuntu-backports which supposedly includes r721.

Steve, any thoughts?